It is not an irrelevant argument,Yellow Contrail is actually making a valid point. He is telling us his opinion why he thinks VNA or any other Asian or African airline of the same 'standards' is able to fly in USA or Europe.
I agree with him in general but I wouldnt say that I know USA is no1 in corruption,i think it is a bit too much to make such a statement with confidence,especially knowing that there are so many other corrupt countries in the world. I would easily put USA as one of the world's most corrupted countries in foreign affairs politics but I do not believe they are corrupted in other sectors as aviation for example.